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Lodash _.initial() Function - GeeksforGeeks

Last Updated : 02 Sep, 2024

Lodash _.initial() function is used to get all elements of the array in the range 0 to n-2. Thereby getting all elements except the (n-1)th element.

Lodash.initial(arrayObject);

• arrayObject: There is only one parameter of type array.

• It returns an array object.

Example 1: In this example, When an array of objects is given we are getting all the elements of that array but not the last one because of the use of the lodash _.initial() function.

// Requiring the lodash library
const _ = require('lodash');

// Original array
let array1 = [
    { 'a': 1, 'b': 2 },
    { 'a': 1 },
    { 'b': 1 }
]

// Using _.initial() function to get 
// all elements of the array in 
// range (0,n-2])
let initialArray = _.initial(array1);

// Original Array
console.log('original Array: ', array1)

// Printing the initialArray
console.log('initial Array: ', initialArray)

Output:

Example 2: In this example, we are getting all the elements of that array but not the last one because of the use of the lodash _.initial() function.

// Requiring the lodash library
const _ = require('lodash');

// Original array
let array1 = [1, 2, 3, 4]

// Using _.initial() function to get 
// all elements of the array in 
// range (0,n-2])
let initialArray = _.initial(array1);

// Original Array
console.log('original Array: ', array1)

// Printing the initialArray
console.log('initial Array: ', initialArray)

Output: 

Example 3: In this example, we are getting empty array beacuse the original array has only one element.

// Requiring the lodash library
const _ = require('lodash');

// Original array
let array1 = [1]

// Using _.initial() function to get 
// all elements of the array in 
// range (0,n-2])
let initialArray = _.initial(array1);

// Original Array
console.log('original Array: ', array1)

// Printing the initialArray
console.log('initial Array: ', initialArray)

Output: 

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